But the secondary attack is indented under the Hit block meaning, at least to me it's a function of hitting with it.Actually, RoB only says "... make a secondary attack." The 2nd attack is conditional on what weapon you're wielding, not if you hit or miss. So, again, just 1 secondary attack.
Look at Sweeping Blow, the weapon effect is above the hit block because that happen regardless of hitting. Or Dance of Steel, clearly that only takes effect if you hit the target with the attack.
They really could have made some of these more clear.